rule win_trochilus_rat_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-12-22"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.6.0"
        signator_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.trochilus_rat"
        malpedia_rule_date = "20201222"
        malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130"
        malpedia_version = "20201023"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    /* DISCLAIMER
     * The strings used in this rule have been automatically selected from the
     * disassembly of memory dumps and unpacked files, using YARA-Signator.
     * The code and documentation is published here:
     * https://github.com/fxb-cocacoding/yara-signator
     * As Malpedia is used as data source, please note that for a given
     * number of families, only single samples are documented.
     * This likely impacts the degree of generalization these rules will offer.
     * Take the described generation method also into consideration when you
     * apply the rules in your use cases and assign them confidence levels.
     */


    strings:
        $sequence_0 = { 50 8bce e8???????? 33c0 6806020000 50 668985f4fdffff }
            // n = 7, score = 100
            //   50                   | push                eax
            //   8bce                 | mov                 ecx, esi
            //   e8????????           |                     
            //   33c0                 | xor                 eax, eax
            //   6806020000           | push                0x206
            //   50                   | push                eax
            //   668985f4fdffff       | mov                 word ptr [ebp - 0x20c], ax

        $sequence_1 = { 50 6a1a 8d85ecfbffff 50 8bcb e8???????? 8b4dfc }
            // n = 7, score = 100
            //   50                   | push                eax
            //   6a1a                 | push                0x1a
            //   8d85ecfbffff         | lea                 eax, [ebp - 0x414]
            //   50                   | push                eax
            //   8bcb                 | mov                 ecx, ebx
            //   e8????????           |                     
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]

        $sequence_2 = { ffb538ffffff e8???????? 59 899d38ffffff e9???????? 8b4654 85c0 }
            // n = 7, score = 100
            //   ffb538ffffff         | push                dword ptr [ebp - 0xc8]
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   899d38ffffff         | mov                 dword ptr [ebp - 0xc8], ebx
            //   e9????????           |                     
            //   8b4654               | mov                 eax, dword ptr [esi + 0x54]
            //   85c0                 | test                eax, eax

        $sequence_3 = { 83f807 7513 8d470c 50 8bc3 e8???????? 8b4718 }
            // n = 7, score = 100
            //   83f807               | cmp                 eax, 7
            //   7513                 | jne                 0x15
            //   8d470c               | lea                 eax, [edi + 0xc]
            //   50                   | push                eax
            //   8bc3                 | mov                 eax, ebx
            //   e8????????           |                     
            //   8b4718               | mov                 eax, dword ptr [edi + 0x18]

        $sequence_4 = { 0fbe1410 891481 40 3b4510 7cf0 }
            // n = 5, score = 100
            //   0fbe1410             | movsx               edx, byte ptr [eax + edx]
            //   891481               | mov                 dword ptr [ecx + eax*4], edx
            //   40                   | inc                 eax
            //   3b4510               | cmp                 eax, dword ptr [ebp + 0x10]
            //   7cf0                 | jl                  0xfffffff2

        $sequence_5 = { 1bf6 23f0 7414 8bc6 8bcf e8???????? }
            // n = 6, score = 100
            //   1bf6                 | sbb                 esi, esi
            //   23f0                 | and                 esi, eax
            //   7414                 | je                  0x16
            //   8bc6                 | mov                 eax, esi
            //   8bcf                 | mov                 ecx, edi
            //   e8????????           |                     

        $sequence_6 = { bb94f00010 891f 83671c00 8d4714 56 8d7720 895f10 }
            // n = 7, score = 100
            //   bb94f00010           | mov                 ebx, 0x1000f094
            //   891f                 | mov                 dword ptr [edi], ebx
            //   83671c00             | and                 dword ptr [edi + 0x1c], 0
            //   8d4714               | lea                 eax, [edi + 0x14]
            //   56                   | push                esi
            //   8d7720               | lea                 esi, [edi + 0x20]
            //   895f10               | mov                 dword ptr [edi + 0x10], ebx

        $sequence_7 = { 83f801 0f8400010000 83f806 0f84f7000000 b98c1d0110 }
            // n = 5, score = 100
            //   83f801               | cmp                 eax, 1
            //   0f8400010000         | je                  0x106
            //   83f806               | cmp                 eax, 6
            //   0f84f7000000         | je                  0xfd
            //   b98c1d0110           | mov                 ecx, 0x10011d8c

        $sequence_8 = { 030495409a8100 eb05 b8???????? f6400420 7415 53 6a00 }
            // n = 7, score = 100
            //   030495409a8100       | add                 eax, dword ptr [edx*4 + 0x819a40]
            //   eb05                 | jmp                 7
            //   b8????????           |                     
            //   f6400420             | test                byte ptr [eax + 4], 0x20
            //   7415                 | je                  0x17
            //   53                   | push                ebx
            //   6a00                 | push                0

        $sequence_9 = { 8b4d14 8d4510 50 ff7510 8b4508 ff750c }
            // n = 6, score = 100
            //   8b4d14               | mov                 ecx, dword ptr [ebp + 0x14]
            //   8d4510               | lea                 eax, [ebp + 0x10]
            //   50                   | push                eax
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   ff750c               | push                dword ptr [ebp + 0xc]

    condition:
        7 of them and filesize < 630784
}